Overview
The ADS5474HFG/EM is a high-performance, 14-bit analog-to-digital converter (ADC) designed and manufactured by Texas Instruments. This device operates at a sample rate of 400 mega-samples per second (MSPS) and is part of a family of 12-, 13-, and 14-bit ADCs that cater to various high-speed applications. The ADS5474HFG/EM is built on Texas Instruments' complementary bipolar process (BiCom3) and is specified over the full military temperature range of –55°C to +125°C.
The ADC features an internal analog buffer, track-and-hold circuit, and reference generator, which simplify system design and ensure high-impedance input to minimize signal source disturbance. It also provides LVDS-compatible digital outputs and supports a wide input bandwidth of 1.4 GHz, making it suitable for converting wide-bandwidth signals.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Resolution | 14 Bits | - | - | - |
| Sample Rate | 400 MSPS | - | - | MSPS |
| Effective Number of Bits (ENOB) | 10.9 Bits | - | - | - |
| Differential Input Range | - | 2.2 VPP | - | VPP |
| Analog Input Common-Mode Voltage | 3.1 V | - | - | V |
| Input Resistance (dc) | 500 Ω | - | - | Ω |
| Input Capacitance | 7.4 pF | - | - | pF |
| Analog Input Bandwidth (–3dB) | 1.28 GHz | - | - | GHz |
| Signal-to-Noise Ratio (SNR) at 230 MHz and 400 MSPS | 69.8 dBFS | - | - | dBFS |
| Spurious-Free Dynamic Range (SFDR) at 230 MHz and 400 MSPS | 78 dBc | - | - | dBc |
| Total Power Dissipation | 2.5 W | - | 2.835 W | W |
| Power Down Mode Power Dissipation | 50 mW | - | 350 mW | mW |
| Operating Case Temperature Range | -55°C to +125°C | - | - | °C |
Key Features
- High-Speed Sampling: Operates at a sample rate of 400 MSPS.
- High Resolution: 14-bit resolution with an effective number of bits (ENOB) of 10.9 bits.
- Wide Input Bandwidth: 1.4 GHz input bandwidth for converting wide-bandwidth signals.
- LVDS-Compatible Outputs: Provides low-voltage differential signaling (LVDS) compatible digital outputs.
- Internal Analog Buffer and Track-and-Hold Circuit: Isolates internal switching from the signal source and provides high-impedance input.
- Internal Reference Generator: Simplifies system design by providing an internal reference voltage.
- Military Temperature Range: Specified over the full military temperature range of –55°C to +125°C.
- Radiation Hardness Assurance (RHA): Up to 100 krad (Si) total ionizing dose (TID) and characterized for single-event latchup (SEL) and single-event upset (SEU).
- Power Down Mode: Low power dissipation of 50 mW in power down mode.
Applications
- Test and Measurement Instrumentation: Suitable for high-speed data acquisition and signal processing.
- Software-Defined Radio: Ideal for high-bandwidth signal conversion in software-defined radio systems.
- Data Acquisition: Used in high-speed data acquisition systems requiring precise and fast analog-to-digital conversion.
- Communication Instrumentation: Applied in communication systems that require high-speed and high-resolution ADCs.
- Power Amplifier Linearization: Helps in linearizing power amplifiers by providing accurate and fast signal conversion.
- Radar Systems: Utilized in radar systems for converting high-bandwidth signals accurately and efficiently.
Q & A
- What is the sample rate of the ADS5474HFG/EM ADC?
The sample rate of the ADS5474HFG/EM ADC is 400 MSPS.
- What is the resolution of the ADS5474HFG/EM ADC?
The resolution of the ADS5474HFG/EM ADC is 14 bits.
- What is the effective number of bits (ENOB) of the ADS5474HFG/EM ADC?
The ENOB of the ADS5474HFG/EM ADC is 10.9 bits.
- What is the input bandwidth of the ADS5474HFG/EM ADC?
The input bandwidth of the ADS5474HFG/EM ADC is 1.4 GHz.
- What type of digital outputs does the ADS5474HFG/EM ADC provide?
The ADS5474HFG/EM ADC provides LVDS-compatible digital outputs.
- Does the ADS5474HFG/EM ADC have an internal reference generator?
Yes, the ADS5474HFG/EM ADC has an internal reference generator.
- What is the operating temperature range of the ADS5474HFG/EM ADC?
The operating temperature range of the ADS5474HFG/EM ADC is –55°C to +125°C.
- Is the ADS5474HFG/EM ADC radiation hardened?
Yes, the ADS5474HFG/EM ADC is radiation hardened up to 100 krad (Si) TID and characterized for SEL and SEU.
- What is the power dissipation in power down mode?
The power dissipation in power down mode is 50 mW.
- In which applications is the ADS5474HFG/EM ADC commonly used?
The ADS5474HFG/EM ADC is commonly used in test and measurement instrumentation, software-defined radio, data acquisition, communication instrumentation, power amplifier linearization, and radar systems.
